Replaceable antenna staff



Oct. 1, 1957 SNYDER REPLACEABLE ANTENNA STAFF Filed March 21, 1957 FIEZ.

FIEL I.

INVENTOR'.

BY GERSON SNYDER ATTYS,

United States Patent REPLACEABLE ANTENNA STAFF Gerson Snyder, Wynnewood, Pa., assignor to Snyder Manufacturing Company, Philadelphia, Pa., 21 corporation of Pennsylvania Application March 21, 1957, Serial No. 647,591

4 Claims. (Cl. 287-20) The present invention relates to new and useful improvements in antenna staffs and more particularly to new and useful improvements in replacement antenna staffs for automobiles and the like which may be secured to any conventional antenna mount and used as a replacement for weather-beaten, broken or stolen antenna staffs.

In many instances, automobile antenna staffs will become rusted or weather-beaten to the extent where they need replacement. Also, automobile antenna staffs will quite frequently be broken or stolen. When an antenna staff is broken or stolen, the antenna mount will usually be left in position on the automobile.

Prior to the present invention, .when one of these above conditions arose, it was necessary to remove the antenna mount from the automobile body and purchase an entirely new antenna staff and mount. Removing the antenna mount is a job involving a considerable amount of time, and replacing an entire antenna structure is relatively expensive. There was not, prior to the present invention, a commercially available replacement antenna staff which could be used to replace weather-beaten, broken or stolen antenna staffs using the original staff mount. This is true, even though, in the great majority of cases, where an antenna staff is broken or stolen the antenna mount remains in good condition, and in position on the automobile body.

With the foregoing in mind, the principal object of the present invention, is to provide a novel replacement antenna staff which may be secured to any conventional an tenna mount and serve as a replacement for weatherbeaten, broken or stolen antenna staffs.

Another object of the present invention is to provide a novel replacement antenna staff which may be easily and permanently secured to an antenna mount and provide a good electrical connection with the antenna mount.

A still further object of the present invention, is to provide a novel replacement antenna staff having the features and characteristics set forth above which is of relatively simplified construction, may be manufactured easily and cheaply, and is entirely efficient and effective in operation and use.

These and other objects of the present invention and the various features and details of the operation and construction thereof are hereinafter more fully set forth and described with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of a replacement antenna staff of the present invention in position above a conventional antenna mount.

Fig. 2 is an enlarged fragmentary view partially in section illustrating the replacement antenna staff of the present invention in position on an antenna mount;

Fig. 3 is a transverse sectional view taken on line 3-3, Fig. 2; and,

Fig. 4 is an exploded perspective view of the various elements of the replacement antenna staff of the present invention.

Referring more specifically to the drawings, reference numeral 10 designatesgenerally a conventional antenna mount in the condition it usually appears when its associated antenna staff has been removed therefrom. A conventional antenna mount of this type comprises a base portion 11 having a small central stud 12 projecting upwardly therefrom, about which is positioned the usual nut 13 for securing the antenna mount to the automobile body.

Reference numeral 14 designates generally the replacement antenna staff of the present invention which comprises a telescoping staff member 15 permanently secured at its lower end to a hollow replacement adaptor 16. The replacement adaptor 16 is of generally frusto+conical shape and has an inwardly extending annular shoulder 17 positioned ashort distance down from the upper end thereof which is engaged by the lower end of the telescoping staff 15. The staff 15 is permanently secured to the adaptor 16 by means of a bolt 18 which extends upwardly through the annular shoulder 17 and is threadedly received within a stem 19 formed, for example, as illustrated in Fig. 4 and is fixed within the lower end of the staif 15. The stem 19 has a series of downwardly and outwardly projecting frusto-conical portions 20 at the upper end thereof which are forced into the lower end of the staff 15 and resist displacement of the stem 19 from the staff 15. By this construction, the stem 19 is securely fixed within the lower end of the staff 15.

A rubber sealing plug 21 is positioned within the staff 15 on topof the stem 19 to prevent any moisture which might enter the staff from passing downwardly through the staff. In addition, the rubber sealing plug 21 acts as a resilient bumper and engages the lower end of the telescoping member of the staff 15 when the telescoping member is in its lower limit position.

In accordance with the present invention, this replacement antenna staff is designed to fit on any conventional antenna mount. To accomplish this, the replacement adaptor 16 has a central longitudinal opening 22 therein which terminates at its lower end in a relatively wide frusto-conical shaped bore portion 23 adapted to fit over the stud 12 and the nut 13 of the antenna mount with the lower edge of the adaptor in engagement with the upper surface of the body portion of the antenna mount. With this type of central bore in the replacement adaptor 16 the adaptor may be readily fitted on any conventional antenna mount regardless of variations in the size of'the studs 12 and nut 13.

In order to permit the antenna staff of the present invention to be securely fixed to the antenna mount, the inner surface of the bore 22 is formed as illustrated in Fig. 3 of the drawings with a pair of flat vertical wall portions 24, 24 joining one another at an obtuse angle. In addition, a pair of set screws 25, 25 having central socket openings therein are threaded through openings in the side wall of the replacement adaptor adjacent the lower portion of the bore 22 equally disposed at opposite sides at a point diametrically opposed to the junction between the wall portions, 24, 24 and are adapted to be forced into pressure applying relationship with the stud 12. By this construction, after the adaptor 16 is placed over the stud 12 and into engagement with the base of the antenna mount with the stud 12 engaging the two wall portions 24, 24 the set screws 25, 25 are threaded inwardly to securely fix the replacement antenna staff in position on the antenna mount 10.

From the foregoing it will be apparent that the present invention provides a novel replacement antenna staff which may be manufactured relatively inexpensively and which may be easily and permanently secured to any conventional antenna mount and serve as a replacement antenna staff for weather-beaten, broken or stolen staffs.

While a particular embodiment of the present invention has been illustrated and described herein, it is not intended to limit the invention to such a disclosure and changes and modifications may be incorporated and embodied therein within the scope of the following claims.

I claim:

l. A replacement antenna staff adapted to be secured to an upwardly extending stud portion of an antenna mount comprising; a tubular staff, a cylindrical stem fixed within the lower end of said tubular staff, an adaptor perable to be secured to the lower end of said staff, means defining a central opening extendinglongitudinally of said adaptor, an inwardly projecting annular shoulder Within said adaptor opening formed integrally with said adaptor and spaced downwardly from one end thereof adapted to receive the lower end ofsaid staff, means interlocking said stem and said adaptor to secure said stem andsaid staff to said adaptor, said adaptor operable to be positioned over the stud portion of said antenna mount,

and locking means extending through the wall of said and coaxial with said stafi, said adaptor having an out-v wardly extending portion thereon fitting within said tubular end portion of said staff and fixedly secured thereto, means defining a central bore extending longitudinally of said adaptor adapted to fit over and receive therein 7 comprising; an antenna staff, an adaptor fixedly secured said stud portion with the adaptor in engagement with the antenna mount, and locking means extending through to one end of said staff, means defining a central bore extending longitudinally of said adaptor, said central bore having an upper portion operable to fit over and receive therein said stud portion and a lower portion of increased diameter spaced outwardly from the stud portion operable to be positioned about said fastening member with the adaptor in engagement with said antenna mount, and locking means extending through said staff into said bore upper portion operable to engage said stud portion and secure said adaptor and staff in position on said antenna mount. 7

4. A replacement antenna structure for an antenna mount having an outwardly projecting stud portion thereon and a fastening member positioned about the inner end of the stud portion in engagement with the antenna mount, comprising; a linear antenna staff having a tubular end portion, an adaptor carried by said tubular end portion of said staff and coaxial therewith, said adaptor having an outwardly extending portion thereon fitting within said tubular end portion of said staff and fixedly secured thereto, means defining acentral bore extending longitudinally of said adaptor coaxially with said staff, said central bore having an upper portion operable to fit over and receive said stud portion and a lower portion of in creased diameter operable to be positioned about said fastening member with the adaptor in engagement with said antenna mount, and locking means extending through said adaptor into said bore upper portion operable to engage said stud portion and secure said adaptor and staff in position on said antenna mount.

References Cited in the file of this patent UNITED STATES PATENTS 1,380,041 Cook May 31, 1921 1,411,852 Ledig Apr. 4, 1922 1,553,315 Gould Sept. 15, 1925 2,534,894 Ledler Dec. 19, 1950 2,605,958 Russell Aug. 5, 1952 2,767,240 Webster et al. Oct. 16, 1956 

